Ok, so here's the deal. Last weekend I tore into the motor in my car to replace the headgaskets. About 23 hours (labor time) later, my buddy and I have her up and running again. Problem is, my poor car has NO power! She's acting like the catalytic converter is clogged (revs part throttle, but can't build RPM when at WOT), but that doesn't seem to be the problem. Last night, I disconnected the down pipe at the manifold, and fired her up. Same problem, stumbles at tip in, poor idle quality, and won't build RPM past about 2k-2500 at WOT. I'm thinking vacuum leak somewhere, but just don't know where to start with the diagnosis. Does anyone have a schematic where all of this spaghetti goes? As far as I can tell, everything appears to be connected properly, but that is just based on where the lines seem to fall naturally. Any ideas?